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        <p>&emsp;&emsp;本文基于rocketmq-all-4.3.0。RocketMQ是阿里巴巴开源的分布式消息中间件，使用java语言编写。下面是整个项目模块：<img src="http://ww1.sinaimg.cn/large/639cfad5gy1fu6tj0zaeoj20ke0hwdiw.jpg" alt="Alt text"><br>&emsp;&emsp;简单介绍下项目各个模块的用途：</p>
<ol>
<li><strong>broker</strong> 是整个消息服务的中心，负责收发消息，连接consumer和producer。</li>
<li><strong>client</strong> 集结了consumer和producer</li>
<li><strong>common</strong> 提供通用基础方法给其他模块调用</li>
<li><strong>dev</strong> 是一个版本控制脚本不用管</li>
<li><strong>distribution</strong> 提供了一些部署的脚本</li>
<li><strong>filter</strong> 过滤器，提供SQL92标准的过滤方式</li>
<li><strong>logappender</strong> 日志模块</li>
<li><strong>logging</strong> 也是日志</li>
<li><strong>namesrv</strong> 注册中心，管理broker和topic信息</li>
<li><strong>openmessaging</strong> openmessaging是由阿里巴巴发起的分布式消息领域的国际标准，这个包主要提供openmessaging标准的部分实现</li>
<li><strong>remoting</strong> 是一个通用的网络通信基础模块，基于netty实现</li>
<li><strong>srvutil</strong> 工具包，里面只有三个类</li>
<li><strong>store</strong> 消息相关存储服务</li>
<li><strong>style</strong> 统一代码风格不用管</li>
<li><strong>test</strong> 测试相关</li>
<li><strong>tools</strong> 工具类，提供一些后台管理的工具</li>
</ol>
<p>&emsp;&emsp;模块众多，重点还是关注<strong>broker</strong>、<strong>client</strong>、<strong>namesrv</strong>、<strong>remoting</strong>、<strong>store</strong>这几个模块，这些也是一个消息中间件的核心模块。</p>

      
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